Okay, So I made A peep group of me and my girlfriend, Is there ANY way to make it to where the peep group you make you can make them hold hands and other stuff like that?

It happens randomly.

so theres no way to do it?

Nope, this a Roller Coaster game not an M rated game.

Tell your girlfriend that if she wants to see this she should do something to encourage you to do that with her for real.